S&C Instruction Sheet 653- 502
29
Operation
Warning Alarm
Description
PES Over Temperature
Indicates the PES is at 100°C (212°F) or higher
Troubleshooting Tip: This could be caused by restricted air flow caused by a dirty or obstructed air filter or a malfunctioned
blower. Check these components to ensure they are clean and functioning properly.
Smoke Warning
Indicates a single smoke detector is activated
Troubleshooting Tip: Investigate the bays to see whether there is a fire.
Test In Bypass Req
Indicates the system has been placed in the
Test in Bypass state
Troubleshooting Tip: No action is required.
Test Run Request
Indicates a test run of the system was requested
Troubleshooting Tip: No action is required.
Time Not Set
Indicates the time is not set in the master control board
Troubleshooting Tip: Contact S&C Electric Company.
Transformer Over Temp
Indicates the transformer compartment is at or above 88°C (190°F)
Troubleshooting Tip: This could be caused by restricted air flow caused by a dirty or obstructed air filter or a malfunctioned
blower. Check these components to ensure they are clean and functioning properly.
Utility Over Freq
Indicates the system is sensing a utility frequency greater than 1 Hz of the nominal frequency
Troubleshooting Tip: The system will respond based on the over-frequency settings. The frequency threshold can be changed if
desired.
Utility Over Voltage
Indicates the system is sensing a utility voltage greater than 110% of the nominal voltage
Troubleshooting Tip: The system will respond based on the overvoltage settings. The voltage threshold can be changed if
desired.
Utility Under Freq
Indicates the system is sensing a utility frequency less than 1.5 Hz of the nominal frequency
Troubleshooting Tip: The system will respond based on the under-frequency settings. The frequency threshold can be changed
if desired.
Utility Under Voltage
Indicates the system is sensing a utility voltage less than 90% of the nominal voltage
Troubleshooting Tip: The system will respond based on the undervoltage settings. The voltage threshold can be changed if
desired.
Table 4. Warning alarms — Continued
Inhibit Alarms
An
Inhibit
alarm indicates a condition that requires attention and places the system in
the
Inhibit
state. The system is not available to protect the load from power disturbances.
See Table 5 for the listed
Inhibit
alarms.
Inhibit Alarm
Description
Battery Discharged
Indicates the batteries are discharged
Troubleshooting Tip: Batteries should automatically be charging. If not and the problem persists, contact S&C Electric Company.
Load Over Current
Indicates the load current has exceeded 115% of the current rating of the system
Troubleshooting Tip: Check the load against what the PureWave UPS System was sized for.
Load Over Power
Indicates the load power has exceeded 115% of the power rating of the system
Troubleshooting Tip: Check the load against what the PureWave UPS System was sized for.
Lost Synch With Util
Indicates the system is not synchronized with the utility
Troubleshooting Tip: If the utility voltage, frequency, and phase rotation are good, contact S&C Electric Company. If the voltage,
frequency, or phase rotation is bad, the inverter may not be able to lock to the utility until the voltage and frequency are both
within tolerance.
Parallel Bd Comm Err
Indicates the parallel board communication is delayed or interrupted
Troubleshooting Tip: Contact S&C Electric Company.
Reverse Phase Rotate
Indicates the phase rotation of the utility and/or load conductors is not correct
Troubleshooting Tip: Verify the phasing by safely checking the utility connection wires.
Table 5. Inhibit alarms.
